Photo taken on Sept. 29, 2017 shows archaeologists working on Keros Island in Greece. Archaeologists unearthed new findings on the Aegean Sea island of Keros during excavations in 2017, Greece's Culture Ministry announced on Jan. 24, 2018. The findings reveal that locals in the early Bronze Age had far more sophisticated architectural and technical expertise than initially thought. (Xinhua/Greek Ministry of Culture)